Soot blower



J. SCHIEFFER SOOT BLOWER Filed March 27, 1935l Dec. 28, 1937.

Patented Dec. 28, 1937 Y PATENT OFFICE e soo'r BLOWER Johann shieirer, oberhausen, Germany. assignl y e or, by: mesne assignments, to Diamond Power if Specialty Corporation, Detroit, Mich., a cor- UNmDsSm-ES 2. poration of Michigan l .',ppiieanon March 2v, 1935, serial No. 13,290

I y i, n In GermanyMarehZS, 1934 v Claims. (Cl. 122-392) This inventionrrelates afsoot blower or fluid heaterwcleaner of the type V.in whicha blowerf v16 limiting, the rotative movement of the blower element. f l

A further object of theinvention'is to provide a stop mechanism of the abovelmentioned character Awhich while being adapted.Y to limit V1 5. the rotative movement of the blower element will nevertheless permit the' blower element to be rotated through a full 360 degrees. 4 g

The invention contemplates further' the provisioniofavblower element mounted for project- I Q0 ing and retracting movement and the provision of an improvedmeansffor `effecting these movements of the blower.elements Numerous other objects; and advantages Y,of thisinvention will become moreapparentasthe following description proceedsgparticu-larly .when reference is had ;to `the accompanyingdrawing wherein Fig. 1 is a longitudinal sectionalview through a soot blower constructed inaccordance with the teachings of thisinventiongf e Fig.,2 is a Vvertical sectional View through the blower shown-in-Fig 1;..and n A Fig. 3 is a fragmentary detail sectional View taken substantially on the lines 3-e-A-3 of Fig. 2. 55, `A Referring then Yparticularly tofvthe drawing wherein like 'reference characters designatefcorresponding partsV throughout vall"v'ie,wsl the numeral I6 designates a wall of a fluid heater'such for example, as a boiler,' there being portions of ,40 the uid heater such as tubes'or the like not shown which are adapted to be"cleaned by the discharge adjacent the same ofcleaning iiuid vas will hereinafter be more'f'llyapparent.

Mounted in anopeningll in the wall IIJ is a wall box I2 providingapassage I3 in which a blowernozzle I4 is mountedlforv rotative and longitudinal movement..` YThe blowernozzle is secured by a 'nipple I5 toa tube I6-`which is mounted for longitudinal movement on a tube I1. A .fluid tighty joint is providedbetween p, the tubes I6 and I1 by 'the-gland lI8 ;and paokingvl 'p The pipe I1 ,is rigidlyv carried by the discharge end 250i `a gooseneck 26. This gooseneck Vforms a part of the blower head Vandis provided at its inlet end;211withfa valve,V seat 28 controlled by a valve 29.` A suitable cleaning uid supply pipe 38 is connected to the inlet end of the gooseneck for supplying cleaning fluid to the same. The valve 26 is provided withl a stem 35 which carries at its end a flange V36 which is engagedv by a 5 spring 3.1 which functions to normally hold the f valve in closed position. A lever 38 pivoted as at 39, on a lug carried by the gooseneck has a portion 40 adapted to engage thervalve stem 35 to move the valve to open position. The lever 38 l0..`

has aV free end 4I adapted to be engaged by a suitable cam for actuating the lever and thus opening the valve as will hereinafter be more fully brought-out. Y

Carried by the wall box II is a base plate 4 15,'

and secured to this base plate is a housing 46. The lower end of the gooseneck is bolted to the base plate as at 41, while` the upper end of the gooseneck is secured to the housing I2 by means ofa protecting. cover 48. 20 `Fixed to theouter end of the tube I6 is a collar 56 which carries atoothor lug 5I for a purpose which will be later described. Secured to the` collar l as by the pins 52 is a cam 53 which is adaptedto engage the end 4I of the 25 lever 38 when the tube I6 isV moved forwardly or intol the fluid heater by mechanism about to, be described. For a substantial portion of its length the outer surface, of the tube I6 is threaded as at 55. Ad- 30 ditionally, the outer surface ofthis tube is provided. withv an'annular groove 56 and a longitudinally extending key way 51. To prevent rotation of the tube I6 during its travel into the fluid heater, there is provided a key or lug 58 35 which is'carried by the baseplate 45 and which engages the key way 51. Journalled in the base plate 45 and inthe housing 46 is the hub 60 of a gear 6I. The interior of the hub 60 is provided with screw threads 62 arranged to engage 40 vthe screw threads on the outer surface of tube 'I6 to eiect ya longitudinal movement of the tube I6 and thusthe blower nozzle or element when thefgear 6111s rotatedvrelativeto the tube I6.v The arrangement is such that the tube I6 will be 45 advanced until the collar 50 contacts the edge of the Yhub 60, and to take up the end thrust on the hub. 66 there is therefore provided the ball thrust bearings 63. Y

For rotating the gear 6I there is provided a ,5,0 pinion 65 which is xed to shaft 66, .this shaft beingl suitably journ'alled in the housing 46 'and .base plate 45, Likewise fixed to shaft 66 is a gear 61 which meshes With a pinion 68 fixed to one end .of ashaft; 69.: Fixed'to the other end of shaft 55 69 is a sheave wheel 18 adapted to be rotated by a suitable chain 1|.

For the purpose of limiting the rotative movement of the blower element while permitting rotation of the element through 360 degrees, the following structure is provided. Formed in the outer face of the housing 46 is a dove tailed groove 15. Secured in one end of this groove as by the pins 18 is a block 11 recessed as at 18 to receive a pawl 19. This pawl is pivotally mounted in the recess on the pin and disposed inthe recess is a spring 8| which normally .urges the pawl outwardly. Fixed in the other end of the dove tailed groove as by the pins 84 is a block 85. This block is provided with a socket which receives a sp-ring 86 and this spring engages the adjacent end of a block 81 which is mounted for sliding movement in the dovetailed groove 15. The block 81 is recessed as at 88 to receive a pawl 89 which is pivoted in the recess as at 98. A spring 9| engages the inner face of pawl 89 and tends tourge the same outwardly.

In operation, it will be understood that normally, that is when the blower element is not in use, it is in its retracted position as shown in Fig. 1 of the drawing. The operation of the blower element consists in moving the same longitudinally until the discharge port thereof is suitably located within the uid heater to discharge cleaning fiuid adjacent the portions thereof to be cleaned and in then rotating the blower element through a desired arc and in then retracting the blower element to its stored position.

This operation is effected by suitably pulling on the chain 1| to rotate the sheave wheel 10 in a counter clockwise direction. This effects the rotation of gear 8| in a counter clockwise direction and the threads on the interior of the hub 60 of this gear engaging the threads 55 on the exterior of tube l5 cause the tube I8 to travel to the right as viewed in Fig. 1 of the drawing. It will be understood that the gear 8| is so journalled as to be held against longitudinal movement while the tube IB is prevented from rotating by virtue of the engagement of key 58 in key way 51.

The axial movement or the projecting of the blower element continues until the key 58 registers with the circumferentially extending groove 56. At this instant the collar 5B abuts the outer end of hub 50 while the cam 53 engages the free end 4| of lever 38 to open valve 29. It might be noted at this point that the cam 53 is circular or conical if the blower element is designed to blow through a complete 360 degrees rotation. If on the other hand, it is desired that the blower element blow through a portion or portions only of its rotation, the cam 53 will be suitably designed to eifect an opening and closing of valve 29 during rotation of the blower element.

The projecting of the blower element to the position where collar 58 abuts hub 69 causes the lug or tooth 5| to engage the outer face 96 of pawl 89 depressing this pawl against the force of spring 9|. Continued counter clockwise rotation of the sheave wheel and thus of the gear 5| causes the blower element to rotate in a counter clockwise direction with the gear 6|, it being understood that this rotation of the blower element is permitted by virtue of the registering of key 58 with the circumferential groove 56. It will be further understood that when the collar 50 abuts hub B8 the hub and collar become locked together thus causing the tube |6 to rotate with the gear 6|.

Counter clockwise rotation of the blower element causes the lug 5| to ride over the pawl 89 or to the left as viewed in Fig. 3 and then around the interior of the housing until it engages the outer face of pawl 19. 'Ihe outer face of this pawl is provided with the cam surface 91 so that the lug 5| depresses the pawl 19 against the force exerted by the spring 8|. Continued rotation of the blower element causes the side face of lug 5| to engage the end face 98 of pawl 89 moving this pawl and its block 81 to the left, as viewed in Fig. 3, against the force exerted by the spring 86. The block 81 is mounted for suicient movement to permit the blower element and the lug 5| to move through 360 degrees at which time further movement of the block 81 and thus of the blower element is prevented by virtue of block 85.

When the blower element has been rotated through 360 degrees the lug 5| has been moved to a position where it clears the end of pawl 19 thus permitting this pawl to resume its normal position and engage the adjacent face of the lug 5|. Thus the lug is held fast between the two pawls 19 and 89 and further rotation of the blower element in either direction is prevented.

If now the sheave wheel is rotated in a clockwise direction, the gear 6| is rotated in the same direction causing the threads on the interior of the hub thereof to effect a longitudinal travel of the tube I6 and the blower element to their retracted position. It will be understood that longitudinal movement of the tube suiicient to move the tooth 5| from between pawls 19 and 89 will be also suicient to cause the key 58 to again engage the key way I6. Thus continued clockwise rotation of the sheave wheel will eect a retracting of the blower element to its original or normal position.

From the above it will be apparent that the invention provides a blower element mounted for rotation together with stop members one of which is mounted for limited movement whereby the blower element may be rotated through a complete 360 degrees. More particularly, the stop mechanism'includes one stop member rotatable with the blower element and another stop member carried by a relatively stationary part of the boiler head. Y

Additionally, the stop members cooperate to so limit the rotation of the blower element that the key way 51 in the tube I6 is aligned with the key 58 so that the blower element may be readily 'retracted after the blowing operation is completed.

When the blower element is projected, the cam 53 carried thereby engages the end of the lever 38 so as to control the actuation of the valve 29 upon rotation of the blower element. Thus any desired degree of blowing may be effected by properly constructing the cam 53.

If it is desired to cause the element to blow through a second 360 degree rotation, it is only necessary to retract tube I6 sufficiently to cause tooth 5| to clear pawl 89 thus permitting the pawl 89 and block 81 to return to their original positions shown in Fig. 3 of the drawing. Then the blower element may be rotated again in a counter clockwise direction through a second 360 degree rotation.

While the invention has been described with some detail, it is to be understood that the description isy for the purposes of illustration only and is not definitive of the limits of the inventive idea. The right is reserved to make such changes in the details of construction and arrangement 75 of parts as will fall within a purview of the attached claims.v

What I claim as my invention is:

1. In a soot blower, a blower element mounted for axial and rotative movement, means for effecting the axial and rotative movements of the blower element means for preventing rotation of said blower element during axial movement thereof, means providing for rotation ofthe blower element after a predetermined axial movement thereof and means for limiting the rotative movement of the blower element to bring the blower element into operative relation with respect to the means which prevents rotationof the blower element during the axial movementthereof.

2. In a soot blower, a blower element mounted for axial and rotative Amovement, means for effecting the axial and rotative movements of the blower element, a cooperatingV key and key wayV for preventing rotation of the blower element during axial movement thereof, means providing for rotative movement of the blower element after a Vpredetermined axial movement thereof, and

means for limiting the rotative movement of the y blower element to align the said keyand key way.

3. In a soot blower, a blower element mounted for axial and rotative movements, the outer surface of said blower element being threaded, a member mounted for rotation on said blower element and having threads engaging the threads on the blower element, means for rotating said member, means for preventing rotation of the blower element to effect an axial movement thereof upon rotation of said member, means providing for rotation of the blower element after a predetermined axial movement thereof, and means for limiting the rotative movement of the thereof, a single means for eiecting the axial and Y rotative movements of the blower element, a stop rotatable with the blower element, and a pair of members fixed against rotation with the blower element and adapted to engage said stop after a predetermined rotative movement ofthe blowerA element to align the said key and key way.

5. In a soot blower, a blower nozzle mounted for axial and rotative movements, a tubular threaded member secured to said blower nozzle for movement with the same, a cleaning iluid supply tube on which said tubular threaded member is telescopioally mounted, said tubular threaded member being provided with a longitudinally extending groove and with a circumferentially extending groove, a key engageable in the longitudinally extending groove to prevent rotation of the tubular threaded member during a portion of its axial movement,. a gear threaded on said tubular threaded member and iixed against longitudinal movement, and means for rotating said gear to cause axial movement of said tubular threaded member andto then rotate said tubular threaded member and the blower nozzle when the key registers with the circumferential groove.

JOHANN SCHIEFFER. 

